Sgt. Dan Salfas, Delaware State Police Pipes and Drums band drum major, salutes 14 placards during the National Police Week Remembrance Ceremony, May 18, 2018, at Dover Air Force Base, Del. The placards were displayed in honor of Air Force security forces members who died in the line of duty since 2005. The ceremony also recognized 12 Air Force Office of Special Investigation agents who made the ultimate sacrifice in defense of the country. (U.S. Air Force photo by Roland Balik)